Furnace for steam-boilers or the like.



PATENTED MAY 9, 1905.

A. S.- GOLDIE.

FURNACE FOR STEAM BOILERS OR THE IKE.

APPLICATION FILED MAY 31. 1904.

8SHEETS-SEEBT 1.

-H H H H H H if f ATTO R NEYS PATENTED MAY 9, 1905.

A, S. GOLDIE.

FURNACE FOR STEAM BOILERS OR THE LIKE.

APPLIOATION FILED MAY 31. 1904.

3 SHEETS-SEBET 2.

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ATTORNEYS PATENTED MAY 9, 1905.

A. S. GOLDIE.

FURNACE FOR STEAM BOILERS OR THE LIKE.

APPLICATION FILED MAY 31. 1904.

L 3 SHEETSSHEET 3 INVENTUR WITNES8E$ mmmm. am il 6 45M ATTORNEYIS Patented May 9, 1905.

FURNACE FOR STEAIVPBOILEHS OR THE LlKE.

SPECIFICATION forming part of Letters Patent No. 789,605, dated May 9, 1905.

Application filed May 31, 1904. Serial No. 210,574.

To all 1071 0111, it may concern:

Be it known that I, ALEXANDER SOMMER- VIL'LE Gomnn, iron-founder, a subject of the King of Great Britain and Ireland, and a resident of Uddingston, Scotland, have invented new and useful 1111provements in Furnaces for Steam-Boilers or the Like, (for which I have filed an application for a patent in Great Britain, numbered 1,7 34: and dated the 23d of January, 1904,) of which the following is a specilication.

This invention has reference to improvements in and relating to the furnacesof steamboilers and the like, and essentially comprises improved bar-plates perforated at their outer extremities and with central air admission and regulating auxiliary fittings.

In order that others skilled in the art to which my invention relates may understand how same may be carried into practice, I have hereunto appended three sheets of illustrative drawings, in which Figure 1 is an elevation, partly in section, and Fig. 2a horizontal section, of the furnace part of a vertical type of circular steamboiler as fitted with my improvements. Fig. 3 is a longitudinal sectional elevation, and Fig. 4: a corresponding horizontal section, of the furnace part of a horizontal type of boiler as fitted with my improvements. Fig. 5 is a transverse sectional elevation as taken on the line 5 5 of Fig. 3, and Fig. 6 is a detached longitudinal front elevation of the perforated plate-bars with the outer shell of boiler structure removed, while Figs. 7 and 8 are an end View and longitudinal sectional elevation of the furnace part of a horizontal type of boiler slightly modified from that shown in Figs. 3 to 6.

Referring to the drawings as applied to the vertical type of circular boiler, as shown in Figs. 1 and 2, the improvements consist in forming the circular bottom or grate of the furnace in sectional fire-bar parts, preferably three parts, a 7) c. Flanges (Z would preferably be formed on each longitudinal edge of the center part b, and the adjacent edges of each of the side parts a and 0 would rest over these flanges (Z, so that the combined three parts form a circular disk. From this circularly-formed disk It b c a series of radial projecting bars or rods 0 would project at shortspaced distances apart, with open spaces between these, forming serrated o 'ienings. In the central part of the center section 7) 1 would preferably lit a box-like chamber 1 with airoutlet grating 71/ on top and resting by flanges over a flange on the center part 7), and below this, supported on a hollow central column '1', I lit a tray-plate with central open space l", leaving a hollow space below the plate-bars a I) c for the heating and updraft of air. Projections Z would be formed on the under surface of the bar-plates a 7) c to rest over the tray 9' and permit the updraft of air. An open horizontal hood m would be fitted, leading from front end of boiler to central space, and an open channel-plate a would be fitted over this hood m for the admission and passage of air to central hollow space of furnace, where an opening 0 would be formed in channel-plate a, and this channel-plate n would preferably be fitted at its front end with a slide-valve 7), all so as to regulate the volume of air admitted to combine with the fuel in the furnace, and so prevent or lessen the emission of smoke.

In applying these improvements to horizontal boilers, such as of the Lancashire or Yorkshire type, the furnace-bottom would preferably be formed in three sectional parts a l) c, as shown in Figs. 3 to 5, the adjacent edges of the side parts resting on flanges (Z on each side of the center part b. The outer side parts 0 of the plate-bars (1 and 0 would preferably be of triangularseetion, with open spaces f between them for the ascent of the air and for the ashes to pass through into the ash-pit, and similar parts a, with open spaces 7", would be formed at front and back of the bar-plates a Z) c. In this arrangement of boiler, Figs. 3 to 6, a pipe a leads the air to the boxlike chamber g, and this pipe is fitted with an ordinary hinged flap-valvep for regulating the volume of air to be admitted. The gaseous products of combustion pass from the furnace through open spaces w, formed in a back plate 11.

In the arrangement of boiler shown in Figs. 7 and 8 air is led by a passage fitted with regulating sliding doors 7*, and this current of air passes up through the hollow column 2 and tray 7' to the end parts of the plate-bars, from whence it goes into the furnace. The air is admitted to the box-like chamber g by a channel a, fitted with a regulating-door 2., and then passes up a stand-pipe u to the said chamber 9. Cleaning-doors o are fitted at each side of the front end of the furnace for access in cleaning.

I am aware that it has heretofore been proposed to construct a circular grate-plate having a plane surface with toothed openings on its periphery; but such construction has not been employed to make use of such openings for draft, and hence it has not been caused to fit the walls of the furnace. I am also aware that grates have been proposed having a raised central part to aid the fuel to feed down its sides to grate-bar openings in plane surfaces adjacent thereto, and these constructions I do not claim.

I do claim as my invention 1. In combination with a furnace, a grate composed of imper'forate horizontally arranged fire-bar plates, the edges of said plates that contact with the furnace-walls being provided with air-inlet openings,the central one of said bar-plates having a grating and means for supplying air to the edges and to the gratin 2. Incombination with a furnace, a grate composed of imperforate horizontally arranged tire-bar plates, the edges of said plates that contact with the furnace-walls being serrated, and the central plate having a grating in its center, an air-distributing heating-tray upon which said plates rest, a box-like chamber beneath the grating in the central plate, and an air-flue leading to said chamber.

3. In combination with a furnace, a grate composed of imperforate horizontally arranged fire-bar plates, the edges of said plates that contact with the furnace-walls being serrated, and the central plate having a grating in its center, an air-distributing heating-tray upon which said plates rest, a box-like chamber beneath the grating in the central plate, and an air-flue leading to said chamber, and a raised hollow column supporting the tray.

In testimony whereof I have signed my name to this specification in the presence of two sul scribing witnesses.

ALEX. S. GOLDIE. Vitnesses:

R. (J. THOMSON, Y. B. BROWNLIE. 

